Ventilator for railway and other vehicles



Sept. 10, 1929. A, A, MEAD 1,727,931

` VENTILATOR Foa RAILWAY AND OTHER VEHICLES Filed Feb. 14, 1929 3 Sheets-Sheet 1 Sept. 10, 1929. A. A. MEAD VENTILATOR FOR RAILWAY AND OTHER VEHICLES Filed Feb. 14, 1929 5 Sheets-5heet Sept. 1o, 1929, A. A. MEAD 1,727,931

VENTILATOR FOR RAILWAY AND OTHER VEHICLS Filed Feb. 14, 1929 5 Sheets-Sheet S 15 they may be outwardly inclined Patented Sept. 10, 1929.

y UNITI-:Deurne BATENT GFFICE.

ALBERT ALFRED MEAD, E LONDON, ENsLANnnssrsNoE 'ro MEAD, MCLEAN a coru- PANY LIMITED, 0E LONDON, ENGLAND, A ConroEA'rIoNoF GREAT BRITAIN.

VENTILATOR FOR RAILWAY AND OTHER VEHICLES."

Application fue@ February 14, 1929, seriaiNo. 839,833, and in Grestfritain December s, 1927.

This invention comprises improvements in and connected with ventilators for railway and other vehicles, and is concerned with ventilators of the louvre type. These ventilators sometimes comprise louvre plates oi glass but such plates maybe of metal or other material where the transparency and attractive appearance of glass are not im portant considerations. rIhe louvreplates are supported vertically by swivel shoes which are simultaneously operated by a horizontally movable bar or the like. The adjustment of this bar swivels the plates to set the latter in an angular position in `which in either direction to a desired degree. Thus, these y"louvre ventilators may be set either for eX- traction or for injection of air according to the direction of theirfinclination with reference to the direction of travel. In the closed condition of ventilators of this type7 the louvre plates are all set in one and the same plane and vertical edges of neighbouring plates are as close together as possible. Nevi ertheless, air, rain, moisture, dust and so on may be forced through the chinks or narrow apertures betweenthe louvre plates. For this reason, it has been proposed to provide a covering device movable out of a closed position in one plane to an open position inanother plane upon opening the louvre, the said device being closed under spring action upon the closing of the louvre.

The object of this invention is to `provide a louvre ventilator' of this type with a simple mechanism adapted for positively adjusting the covering device to a closed position whenthe louvre ventilator is adjusted to its closed position and for positively adjusting the covering device to an open position when the louvre ventilator is adjusted to an open condition of any desired degree in either direction.

In order to enable the invention to be readily understood, reference is directed to the accompanying drawing in whichz Figure 1 illustrates one form of ventilator in elevation together with distant operating means therefor'.

Figure 2 showsthe same ventilator in plan. y i y 4 Figure 3 is a section along the line III- yIII of Figure l looking upwards in the direction of the arrows. y f

Figure l is a cross-section of Figure l. f Figure 5 is a "fragmentary view showing modified `louvres applicable to constructions such as are seen in Figures 1 to 4 as will be hereinafter described.

Figure 6 is a view ysimilar to Figure 4 of asecond form of ventilator in accordance with this invention. l 4 y Figure 7 is a rcentral horizontal section, similar to Figure 3, of another form of ventilator and y i Figure 8 is a transverse section of suc ventilator. l l i In the construction illustrated by Figures l to 4, theventilator comprises an` open 'oblonglcasing or framing a provided in kone open'face with vertical louvre'- plates b and in its opposite open face with horizontal louvre plates c. Z represent-s part of the vehicle door or wall in which the ventilator is mounted with the yvertical louvres on the inside and the horizontal louvres outside. The louvre platesb and c may beglass strips7 as shown7 having swivel shoes e, f respectively, secured to their ends. The pivotsg ofthe swivel shoes e of the vertical louvre plates are received in bearingsprovided along the top and bottom longitudinal bars of the casing or framing a at one' side thereof. lThe pivots t of the swivel shoes `f of the horizontal louvre plates are received in bearings provideddown4 the edges of the vertical bars of they casing or framing@ at the opposite sides of the latter. The number of vertical louvre plates may, as showmbegreater than the number of horizontal louvre plates.

The swivel shoes e aty one end of the vertical louvre plates are formed or fitted with lugs or arms 7c, Figures 3 and il, which eX- tend inwardly of thefca'sing or framing a, and `such arms havepivotal connection at Z with a bar m which is shiftable endwise and has aparallel ruler motion owing to its pivotal connection with the several swivel shoes. Usually, and as shown7 this bar m is disposed the longitudinal slot of the vb'ar in the top longitudinal member of the framing so that it is the top swivel shoes that are provided with the arms 7c for pivotal connection with the bar. Y The swivel shoes f at one end of thehorlzontal louvre platesc are formed with arms or lugs fn. also extending inwardly of the casing or framing a and such arms have pivotal connectioat o with a short bar 7i movable endwis'e up and down against one of the side walls of the casing. Y f The vertical louvre plates Z) are so dimensioned and disposed that in their closed position, they are all edge to edge in one and the saine plane asatoresaid and as will be seen from Figures l and 3. Thus they can be adjusted to any angle of inclination ijn either direction as already explained. The horizontal louvre plates c are also pret'- erably so dimensioned and disposed on their pivots la that in their closed position they come into the same plane as seen in Figures 3 yand 4. T'he horizontal louvres can be turned upwardly to an open position shown,

myfor example, by dotted lines in Figure 4 anddownwardly to a closed position. One of the swivel shoes f or lugs frz of the top horizontal louvre' plate is formed or fitted with a projection such as r which is suitably rounded and that end of the horizontally Inova-ble bar fm. which is adjacent to 'such shoe is formed or fitted with a longitudinally slotted projection vs, Figure 3. ,'On the underside of the top member of the casing a there is pivoted a lever t extending longitudinally. of the casing ,from its pivot u towards the adjacent end of .the casing. This lever is provided intermediately with a downwardly projecting pin @taking into end of such lever is provided with a forl w for 4engaging withthe project-ion r on the 4swivel shoe aforesaid of the upper horizontal louvre.`

In the `closed 'condition of the ventilator, the horizontally movabley bar m occupies Va mid-position loi'i-gitudinallyv but an outward position. (as compared with the vehicle) lat-- erally ofthe fra-me a as Vseen in Figure 3. Longitudinal movement of this bar in either `direction from this mid-.position causes-the vertical louvre plates b t`o be swivelledy one way or the other and to acquire an angular setting; in one sense or the otherrin relation to the direction of travel of t-he vehicle. The bar will also move bodily, laterally, owing to ythe parallel-'roller motion, but such lateral movement will be always in the samefdirection, inwardly, from the above-mentioned outwardY position. Consequently any movement of the bar m will, as regards the longitudinal component, merely cause the slotted part s to slide past the pifn o ofthe lever t in one direction or the other. As regards the lateral compo- The f nent, however, the slotted partwill draw the pin o and, therefore, the lever t laterally and thus inwardly as compared with the vehicle. This movement of the lever t is communicated through its work fw to the projection 1' aforesaid, thereby swivelling the shoe of the top horizontal louvre plate 0 and causing the latter to turn upwardly and outwardly. Owing' tothe inter-connection of the horizontal louvre plates c by thebar p as aforesaid, they are all movedl simultaneously and similarly, as indicated by the dotted lines Vin Figure` 4, so that opening of the vertical louvre plates b in either direction brings about an opening movement of the vhorizontal louvre plates c.

The bar m may be operated in any suitable manner and by way of example a Bowden wire or like flexible control is illustrated in Figures l and 2. At either end the bar m has upwardly extending pins or studs w passing through slotsg/ y in the upper bar of the casing a and connected .to respective flexible wires e a of the control. The posts l fixed on they top bar of the frame or casing a are for. anchoring the casings or sheaths of the flexible 'transmission wires a, e. Operation of the wires is by a lever 2 which may be situated in any convenient position in the vehicle. In the central position of the oper= ating lever, seen in Figure l, the ventilator is closed. VOn movement ot the lever to either side of this position thebar fm, is moved to open the ventilator. The slots y, y aforesaid would have to be of curved form Yto conform to true parallel-ruler movement of the bar m but for the sake of simplicity they may be made of V form as shown aud the lugs 7c of the upper swivel shoes 'of the vert-ical louvres b slotted as at 3 (Figure 3) where they engage the pins Z to allow ofthe slight departure from true parallel-ruler motion. The slots y, y not only impart guidance to the bar m but they also have Aacamming action on the bar to impart lateral movementto it positively and, in conjunction with the slots 3, relieve the swivelshoes and pivots g, Z of the vertical louvres .b of strain (which they might otherwise have to bear) involved in operating the horizontal louvres c. The flexible transmission may be wholly enclosed if desired, within the wall p'anelling of the vehicle and'only the operating lever 2 be visible and accessible.

The horizontal lo'uver plates c may be adapted to overlap one another slightly in the 'closed position. For example, they may be formed with bevclled edges which overlap when the plates are moved to the closed position as seen in Figure 4. Having regard to the tact that air or matter has only very limited access when the vertical louvre plates Z) are closed, the further protection ifoo aiiorded by overlapping bevelled edges of the horizontal louvre plates c renders the entry of air or matter into the interioifol the vehicle practically impossible. yAs any alternative to the bevalling of the edges, and as indicated in the fragmentary view, Figure 5, each of the horizontal louvre plates c may be litted along one edge with :i strip fl ot' metal, wood, rubber or other material, designed to overlap the edge of a ibouring plate in the closed condition and to seal any slit or cliink that may exist between such plates.

It will be apparent that other mechanisms er mechanical motions than that described may be adopted for securing co-ordinated movements of the two sets of ventilator devices b, c. Also that the movements in the particular mechanism above described may be modified to suit requirements as by giving a suitable inclination or cam-shape t the slot or' the slotted part s oi.'l the bar m.

lis a modification of the above described ventilator, instead of a horizontal louvre device comprising a plurality of louvre plates, a simple 'flap or single louvre plate may be employed. This is illustrated by way of example in Figure 6 in which a single flap of framed glass is hinged at the upper edge at 6 along the upper longitudinal edge of the frame or casing a and adapted to be opened and closed by a lever 7 mounted by means oit pivot 8 along one side of the ventilator frame. In other respects the ventilator is similar to that shown in Figures 1 to gli. ln Figure 6, the fork 'w engages a pin S) on the upper end of the lever 7 and the lower end of the lever is connected by pin and slot with an arm 10 fixed to the frame of the flap 5. Thus when the vertical louvre plates are moved to the open position in either direction the flap 5 will also be opened, as shown for example, by dotted lines, and when the vertical louvre plates are moved to the closed position the ilap 5 will be positively closed. The frame ot the ilap is recessed around the edge to receive a packing" 11 ilor sealing the liap against the outer edge ot the frame or casing a in the closed position.

In the construction shown in Figures 7 and 8, the cover device consists olf an open angle iron frame 12l in which is hingedly mounted a window 13, and this cover device is movable bodily away from the casing a to the open position seen in dotted lines in Figure 8. The bar m pivotally connected with the slices of the louvre plates Z) is, in this case, fitted with two plates lil having slots 15. Angle levers 1G secured interniefliately to pivot pins 17, have pins on their short arms engaging in the slots 15. At the end ol its long arm one of the levers 1G is connected by a linl: 18 with a lug 19 at one top corner of the angle frame 10 the "correspondingend `of the otherarm of the other lever being connected directly to a yilar tothe long arms of the leverslG. These arms 16 `are connected with the bottom 'corners of the frame 12 in a manner similar to the upper arms 1G. It will now be seen that when the -:bar m is moved'in either direction for opening the louvre b, the resultant lateral movement of such bar will rock the levers 16 and lever arms 16 to move the cover device 12, 13 bodily away from the seating 11. Movement of the 'bar m to close the louvrek will operate the leversl, 16l ieversely so thatfthe cover device will be drawn powerfully at all yfour corners to the closed position against the seating 11. The window 1S is hingedly mountedin the frame 1.2 so,y that it can be opened to give access to the louvre plates for cleaning andy to the mechanism for lubrication orfadjustment. i

It will be appreciated that infany of the constructions described, the space within the casing between the two ventilator parts need. only be shallow from front to back. As matter may be deposited in this space within the casing, cleaning holes may be Jformed in the latter if desired tor enabling such matter to be removed, as indicated by way of example at 21, in Figure 4l. Facility for cleaning the glass surfaces within ythe casing, may be provided for by dividing the frame in a plane parallel with its front and back laces and these divided parts may be hingedly connected along one side as shown by way ot' example at 22 in Figure 6 and fitted with locking means 23 at the opposite side. To allow of the hinging, the lever t could be removed `or loosened on its pivot aso asqtoy disconnect the operating mechanism of the two parts of the ventilator as will be readily understood. v

I claim zf 1. Vehicle ventilator comprising in combination a reversible louvre device, a cover device adapted to be opened by moving it out oi its plane oi closure, and interconnecting mechanism Voperating positively both to open said cover device when said reversible louvre is opened and to close said cover device when said reversible louvre is closed.

2. Vehicle ventilator ycomprising in combination a reversible louvre device, a cover device adaptedto `be opened by moving it out of'its plane of closure, a bar having pivotal engagement with swivel members of the louvre device, a lever system` koperatively connected with said bar, and an operative connection between said lever system and said cover deviceA to positively openy and closethe latter.

3. Vehicle. vventilator comprising in combination a reversible louvre device, a cover device adapted tol be opened by mov-ing it out of itsr plane of closure, interconnecting mechanism operating to ensure simultaneous opening or closing movements of saidflouvre and said cover device, a manual control means, and a flexible transmission between said control means and said mechanism.

4. Vehicle ventilator. comprising in combination a reversible louvre device, a cover` device adapted to be opened by movement bodily away from its plane of closure, and a plurality kof lever systems inter-connecting said louvre and cover devices and operative for positively opening or closing said cover device simultaneously with opening or closing of said. reversible louvre.

5. Vehicle ventilator comprising in combination a yreversible louvre device, a cover device adapted to, be opened by movement bodily away from its plane of closure, a slidable bar having pivotal engagement with the vswivel shoes of the louvre, and a plurality of lever systems having pin and slot engagement with said bar and operative connection with points distributed over said cover device substantially as set forth.V

46. Vehicle ventilator comprising a fixed ventilator casing, a reversible louvre device therein, a cover device adapted to be opened by moving it out of its plane of closure, a bar having pivotal engagement with swivel members of the louvre device, a lever system operatively connected with said bar, an operative connection between said lever system and said cover device whereby the latter is positivelyy opened or closed when the louvre device is opened or closed, and guiding means in the iiXed ventilator casing for said bar substantially as set forth.

7. Vehicle ventilator comprising an open framing, a reversible louvre adapted vfor closing one side of said framing, a cover de'- vice closable against the opposite side of ysaid framing and movable away from said side to open, a bar slidable along and laterally of said framing and having pivotal connection with kswivels of said louvre, and lever mechanism influenced by lateral movement of said bar and operatively connected with said cover device to produce positive opening or closing of the latter as said louvre opens or closes substantially as set forth.

8. Vehicle ventilator comprising an open framing, a reversible louvre adapted 'for closing one side of said framing, a cover device closable against the opposite side of said framing, a bar slidable along and later'- ally of said framing and having pivotal connection with swivels of said louvre, lever mechanism influenced by lateral movement of said bar and operatively connected with said cover device to produce positive opening or closing of the latter as said louvre opens or closes, a manual control, and a Bowden wire transmission between said control and opposite ends of said bar substantially as set forth.

ALBERT ALFRED MEAD. 

